In the science fiction film, the protagonists escape a variety of challenges and eventually find themselves in the Building of Dreams. They see other people moving about quietly, occasionally taking someone else's dream from a shelf and staring into it or sitting and pondering their own. They find entire areas dedicated to one type of dream or another. The overall atmosphere is infused with thought and creativity. New dreams are brought in. Old ones may be sold. Many are taken away from the building so they can be studied elsewhere. The main character can hear people recommending - or even arguing about - dreams, but the voices are subdued and the dream containers are treated with respect. All seems carefully organized. This is clearly a special place.
They are in a library.